312505945 has 16 divisors (see below), whose sum is σ = 392113152. Its totient is φ = 238645440.

The previous prime is 312505937. The next prime is 312505957. The reversal of 312505945 is 549505213.

It is not a de Polignac number, because 312505945 - 2³ = 312505937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312505945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59704 + ... + 64726.

It is an arithmetic number, because the mean of its divisors is an integer number (24507072).

Almost surely, 2^312505945 is an apocalyptic number.

It is an amenable number.

312505945 is a deficient number, since it is larger than the sum of its proper divisors (79607207).

312505945 is a wasteful number, since it uses less digits than its factorization.

312505945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5592.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 312505945 is about 17677.8376788565. The cubic root of 312505945 is about 678.6087073782.

The spelling of 312505945 in words is "three hundred twelve million, five hundred five thousand, nine hundred forty-five".